結果
| 問題 |
No.162 8020運動
|
| ユーザー |
msm1993
|
| 提出日時 | 2020-06-01 11:53:58 |
| 言語 | C++14 (gcc 13.3.0 + boost 1.87.0) |
| 結果 |
AC
|
| 実行時間 | 75 ms / 5,000 ms |
| コード長 | 2,714 bytes |
| コンパイル時間 | 1,830 ms |
| コンパイル使用メモリ | 166,992 KB |
| 実行使用メモリ | 5,248 KB |
| 最終ジャッジ日時 | 2024-11-21 12:42:12 |
| 合計ジャッジ時間 | 4,050 ms |
|
ジャッジサーバーID (参考情報) |
judge2 / judge3 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 3 |
| other | AC * 26 |
ソースコード
#include "bits/stdc++.h"
using namespace std;
typedef long long ll;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;
const int INF = 1e9;
const ll LINF = 1e18;
template<class S,class T> ostream& operator << (ostream& out,const pair<S,T>& o){ out << "(" << o.first << "," << o.second << ")"; return out; }
template<class T> ostream& operator << (ostream& out,const vector<T> V){ for(int i = 0; i < V.size(); i++){ out << V[i]; if(i!=V.size()-1) out << " ";} return out; }
template<class T> ostream& operator << (ostream& out,const vector<vector<T> > Mat){ for(int i = 0; i < Mat.size(); i++) { if(i != 0) out << endl; out << Mat[i];} return out; }
template<class S,class T> ostream& operator << (ostream& out,const map<S,T> mp){ out << "{ "; for(auto it = mp.begin(); it != mp.end(); it++){ out << it->first << ":" << it->second; if(mp.size()-1 != distance(mp.begin(),it)) out << ", "; } out << " }"; return out; }
/*
<url:https://yukicoder.me/problems/no/162>
問題文============================================================
=================================================================
解説=============================================================
================================================================
*/
typedef long double ld;
ld memo[21][15];
ld P[3];
ld rec(int a,int tooth){
if(a == 0) return tooth;
ld& ret = memo[a][tooth];
if(!(ret < 0)) return ret;
ret = 0;
if(tooth == 1){
ret = (1-P[0])*rec(a-1,tooth);
}else{
for(int t = 0; t < (1<<tooth);t++){
ld Ptooth = 1;
ld sum = 0;
int cnt_tooth = 0;
for(int b = 0; b <= tooth;b++){
if((t>>b)&1){
if(b == 0 || b == tooth-1){
Ptooth *= (1-P[1]);
}else{
Ptooth *= (1-P[2]);
}
cnt_tooth++;
}else{
if(b == 0 || b == tooth-1){
Ptooth *= P[1];
}else if(b != tooth){
Ptooth *= P[2];
}
if(cnt_tooth){
sum += rec(a-1,cnt_tooth);
}
cnt_tooth = 0;
}
}
ret += Ptooth * sum;
}
}
return ret;
}
ld solve(){
fill(*memo,*memo+21*15,-1);
ld res = 0;
int A; cin >> A; A = 80 - A;
for(int i = 0; i < 3;i++){ cin >> P[i]; P[i]/=100;}
res = rec(A,14)*2;
return res;
}
int main(void) {
cin.tie(0); ios_base::sync_with_stdio(false);
cout << fixed << setprecision(12) << solve() << endl;
return 0;
}
msm1993